At present, the thinnest TPU cored wire is about a few tenths of a millimeter.

At present, the minimum diameter of TPU cored wire has reached 0.38mm, and smaller circular diameter is still being tried.

However, at present, the minimum diameter of TPU core-spun yarn is 0.7 mm.

Still in the development stage.

Just like this is TPU cored wire.

This is TPU core-spun yarn with wool in the middle.